mybatis连接PGSQL中对于json和jsonb的处理

pgsql数据库表字段设置了jsonb格式；在java的实体里使用String或者对象转换会一直提示一个错误：

Caused by: org.postgresql.util.PSQLException: ERROR: column "xx" is of type jsonb but expression is of type character varying

需要加一个转换方法：

import com.alibaba.fastjson.JSON;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedTypes;
import org.postgresql.util.PGobject;import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;/***  PGJsonTypeHandler:处理Object对象类型与postgresql中JSONB类型之间的转换*  author:lipu*  created_at:2021/07/29 14:00*/
@SuppressWarnings("unchecked")
@MappedTypes(value = {Object.class})
public class PGJsonbTypeHandler<T extends Object> extends BaseTypeHandler<T> {private static final PGobject pgObject = new PGobject();@Overridepublic void setNonNullParameter(PreparedStatement preparedStatement, int i, T parameter, JdbcType jdbcType) throws SQLException {if (preparedStatement != null) {pgObject.setType("jsonb");pgObject.setValue(JSON.toJSONString(parameter));preparedStatement.setObject(i, pgObject);}}@Overridepublic T getNullableResult(ResultSet rs, String columnName) throws SQLException {return (T) JSON.parse(rs.getString(columnName));}@Overridepublic T getNullableResult(ResultSet rs, int columnIndex) throws SQLException {return (T) JSON.parse(rs.getString(columnIndex));}@Overridepublic T getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {return (T) JSON.parse(cs.getString(columnIndex));}
}

定义实体DO的时候，指定：

@TableField(typeHandler = PGJsonbTypeHandler.class) // 用于 PostgreSQL 的 JSONB 类型

比如：

    @TableField(typeHandler = PGJsonbTypeHandler.class) // 用于 PostgreSQL 的 JSONB 类型private ShipToAddr shipToAddr;